Air conditioner and control method thereof

Abstract

The invention discloses an air conditioner and a control method thereof.The air conditioner comprises a refrigerant circulation loop, an outdoor heat exchanger, an indoor heat exchanger, an indoor unit, an outdoor unit, an indoor fan, an indoor motor, an outdoor fan, an outdoor motor, an indoor coil temperature sensor, an indoor environment temperature sensor, a heating device and a controller; the controller is configured to determine the heat preservation performance grade of a room when the air conditioner is in a heating mode, and control the operation power of the compressor and the heating device and the rotating speed of the outdoor motor and the rotating speed of the indoor motor according to the heat preservation performance grade of the room and the indoor environment temperature so as to adopt different control strategies for rooms with different heat preservation performance grades. And the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner and a control method thereof. Background Art

[0002] In the prior art, when the air conditioner heating mode is just started, the indoor coil temperature may be too low, resulting in the cold wind prevention stage, the internal fan stops running, and no hot air is blown out. Especially when the indoor and outdoor ambient temperatures are particularly low, the cold wind prevention stage will be relatively long, which can easily make the user think that the startup is unsuccessful or the air conditioner is broken, and then use the air conditioner remote control to operate again, affecting the normal operation of the machine and providing a poor user experience. In addition, in the heating mode, after the temperature control is turned off, for rooms with good thermal insulation, the indoor ambient temperature slowly drops to the temperature control startup, and the user experience is good; for rooms with poor thermal insulation, in the heating mode, after the temperature control is turned off, the indoor ambient temperature quickly drops to the temperature control startup, and the user will feel cold and hot, which is a poor user experience and may also make the user mistakenly believe that the air conditioner has stopped working. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the present invention is to provide an air conditioner and a control method thereof.

[0004] The present invention provides an air conditioner, which includes: a refrigerant circulation loop, which allows the refrigerant to circulate in a loop composed of a compressor, a condenser, an expansion valve, an evaporator, a four-way valve and a pressure reducer; an outdoor heat exchanger and an indoor heat exchanger, wherein one works as the condenser and the other works as the evaporator; an indoor unit, wherein the indoor unit includes the indoor heat exchanger, which is used to exchange heat between the refrigerant and the indoor air; an outdoor unit, wherein the outdoor unit includes the outdoor heat exchanger, which is used to exchange heat between the refrigerant and the outdoor air; an indoor fan, which is used to drive the indoor air to pass through the indoor heat exchanger by rotating, so that the refrigerant and the indoor air can exchange heat; an indoor motor, which is used to drive the indoor fan to rotate and drive the indoor air to pass through the indoor heat exchanger, so that the refrigerant and the indoor air can exchange heat; and an indoor motor, which is used to drive the indoor fan to rotate and drive the indoor air to pass through the indoor heat exchanger, so that the refrigerant and the indoor air can exchange heat. The indoor fan; an outdoor fan, which drives the outdoor air to pass through the outdoor heat exchanger by rotating, so that the refrigerant and the outdoor air can exchange heat; an outdoor motor, which drives the outdoor fan; an indoor coil temperature sensor, which is used to detect the indoor coil temperature; an indoor ambient temperature sensor, which is used to detect the indoor ambient temperature; a heating device, which is used to heat the air flowing through the air outlet; a controller, which is configured to: when the air conditioner is in heating mode, determine the thermal insulation performance level of the room; and control the operating power of the compressor and the heating device, and the rotation speed of the outdoor motor and the indoor motor according to the thermal insulation performance level of the room and the indoor ambient temperature.

[0005] In addition, the air conditioner according to the embodiment of the present invention may also have the following additional technical features:

[0006] Further, when the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, the controller is specifically configured as follows: when the room has a high thermal insulation performance level and the indoor ambient temperature is greater than a first preset temperature, the compressor is controlled to stop, the outdoor motor is controlled to stop running, the heating device is controlled to stop heating, and the indoor motor is controlled to stop running after running for a first preset time; when the room has a high thermal insulation performance level and the indoor ambient temperature is less than a second preset temperature, the compressor is controlled to start, the outdoor motor is controlled to run at a first preset speed, the heating device is controlled to heat at a first preset power, and the indoor motor is controlled to run at a second preset speed, wherein the second preset temperature is not greater than the first preset temperature.

[0007] Further, when the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, the controller is specifically configured as follows: when the room has a low thermal insulation performance level and the indoor ambient temperature is greater than the first preset temperature, the compressor is controlled to stop, the outdoor motor is controlled to stop running, the heating device is controlled to heat at a second preset power, and the indoor motor is controlled to run at a third preset speed, wherein the third preset speed is less than the second preset speed, and the second preset power is less than the first preset power; when the room has a low thermal insulation performance level and the indoor ambient temperature is less than the second preset temperature, the compressor is controlled to start, the outdoor motor is controlled to run at the first preset speed, the heating device is controlled to heat at the first preset power, and the indoor motor is controlled to run at the second preset speed.

[0008] Furthermore, before determining the thermal insulation performance level of the room, the controller is also configured to: control the operating power of the compressor and the heating device, and the rotation speeds of the outdoor motor and the indoor motor according to the indoor coil temperature.

[0009] Further, when the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the indoor coil temperature, the controller is specifically configured as follows: when the indoor coil temperature is greater than a third preset temperature, the compressor is controlled to start, the outdoor motor is controlled to operate at the first preset speed, the heating device is controlled to heat at the first preset power, and the indoor motor is controlled to operate at the second preset speed, wherein the third preset temperature is less than the second preset temperature; when the indoor coil temperature is not greater than the third preset temperature, the compressor is controlled to stop, the outdoor motor is controlled to stop operating, the heating device is controlled to heat at the third preset power, and the indoor motor is controlled to operate at a fourth preset speed, wherein the third preset power is greater than the first preset power, and the fourth preset speed is less than the second preset speed.

[0010] Furthermore, when determining the thermal insulation performance level of the room, the controller is specifically configured to: determine the first time that the air conditioner enters the heating mode; when the indoor ambient temperature is greater than a first preset temperature, control the compressor to stop, control the outdoor motor to stop running, control the heating device to stop heating, and control the indoor motor to stop running after running for a first preset time, and obtain the time required for the indoor temperature drop to reach a preset drop; determine the thermal insulation performance level of the room according to the time required for the indoor temperature drop to reach the preset drop.

[0011] Further, when determining the thermal insulation performance level of the room based on the time required for the drop in indoor temperature to reach the preset drop, the controller is specifically configured as: when the required time is greater than a second preset time, determining that the room has a high thermal insulation performance level; when the required time is not greater than the second preset time, determining that the room has a low thermal insulation performance level, wherein the second preset time is determined based on the current outdoor ambient temperature and the indoor ambient temperature.

[0012] Further, when determining the second preset time according to the current outdoor ambient temperature and indoor ambient temperature, the controller is specifically configured to: query the preset outdoor ambient temperature step-indoor ambient temperature step-preset time correspondence mapping table according to the current outdoor ambient temperature and indoor ambient temperature, and obtain the second preset time corresponding to the current outdoor ambient temperature and indoor ambient temperature.

[0013] Furthermore, the first preset temperature is the sum of the set temperature and the correction temperature, and the second preset temperature is the difference between the set temperature and the correction temperature.

[0014] According to the air conditioner of the embodiment of the present invention, the air conditioner includes: a refrigerant circulation loop, an outdoor heat exchanger, an indoor heat exchanger, an indoor unit, an outdoor unit, an indoor fan, an indoor motor, an outdoor fan, an outdoor motor, an indoor coil temperature sensor, an indoor ambient temperature sensor, a heating device and a controller. Among them, the refrigerant circulation loop allows the refrigerant to circulate in a loop composed of a compressor, a condenser, an expansion valve, an evaporator, a four-way valve and a pressure reducer; the outdoor heat exchanger and the indoor heat exchanger, one of which works as a condenser and the other works as an evaporator; the indoor unit includes an indoor heat exchanger for heat exchange between the refrigerant and the indoor air; the outdoor unit includes an outdoor heat exchanger for heat exchange between the refrigerant and the outdoor air; the indoor fan is used to drive the indoor air through the indoor heat exchanger by rotation so that the refrigerant and the indoor air can exchange heat; the indoor motor is used to drive the indoor fan; the outdoor fan is used to drive the outdoor air through the indoor heat exchanger by rotation The air conditioner is connected to the outdoor heat exchanger to exchange heat between the refrigerant and the outdoor air; the outdoor motor is used to drive the outdoor fan; the indoor coil temperature sensor is used to detect the indoor coil temperature; the indoor ambient temperature sensor is used to detect the indoor ambient temperature; the heating device is used to heat the air flowing through the air outlet; the controller is configured to: when the air conditioner is in heating mode, determine the thermal insulation performance level of the room, and control the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor according to the thermal insulation performance level of the room and the indoor ambient temperature, so as to adopt different control strategies for rooms with different thermal insulation performance levels, thereby improving the user experience. Furthermore, before determining the thermal insulation performance level of the room, the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the indoor coil temperature, so that the air conditioner can continue to blow out hot air through the heating device even in the cold wind protection stage, so as to avoid discomfort to the user and further improve the user experience.

[0015] In response to the above-mentioned problems, the present invention also proposes a control method for an air conditioner, which is used for an air conditioner as described in any of the above embodiments, and the method comprises the following steps: when the air conditioner is in heating mode, determining the thermal insulation performance level of the room; controlling the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor according to the thermal insulation performance level of the room and the indoor ambient temperature.

[0016] According to the control method of the air conditioner of the embodiment of the present invention, when the air conditioner is in the heating mode, the thermal insulation performance level of the room is determined, and the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, so as to adopt different control strategies for rooms with different thermal insulation performance levels, thereby improving the user experience. Furthermore, before determining the thermal insulation performance level of the room, the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the indoor coil temperature, so that the air conditioner can continue to blow out hot air through the heating device even in the cold wind protection stage, so as to avoid discomfort to the user and further improve the user experience.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a structural schematic diagram of an air conditioner according to an embodiment of the present invention;

[0020] Figure 2 It is a flow chart of controlling the operating power of a compressor and a heating device, and the rotation speed of an outdoor motor and an indoor motor according to the thermal insulation performance level of a room and the indoor ambient temperature according to an embodiment of the present invention;

[0021] Figure 3 is a flow chart of controlling the operating power of a compressor and a heating device, and the rotation speeds of an outdoor motor and an indoor motor according to the thermal insulation performance level of a room and the indoor ambient temperature according to another embodiment of the present invention;

[0022] Figure 4 is a flow chart of controlling the operating power of a compressor and a heating device, and the speed of an outdoor motor and an indoor motor according to the indoor coil temperature according to an embodiment of the present invention;

[0023] Figure 5 is a flow chart for determining the thermal insulation performance level of a room according to an embodiment of the present invention;

[0024] Figure 6 is a flow chart of judging the thermal insulation performance level of a room according to the time required for the indoor temperature drop to reach a preset drop according to one embodiment of the present invention;

[0025] Figure 7 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The air conditioner of the present invention performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an electronic expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0031] The compressor compresses the refrigerant gas at high temperature and high pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0032] The electronic expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the electronic expansion valve and returns the refrigerant gas in the low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. During the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0033] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit of the air conditioner includes the indoor heat exchanger, and the electronic expansion valve can be provided in the indoor unit or the outdoor unit.

[0034] The outdoor heat exchanger and the outdoor heat exchanger are used as condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner serves as a heater in the heating mode. When the indoor heat exchanger is used as an evaporator, the air conditioner serves as a cooler in the cooling mode.

[0035] The following refers to Figure 1-Figure 7 Describe the air conditioner and its control method according to an embodiment of the present invention.

[0036] Figure 1 It is a schematic structural diagram of an air conditioner according to an embodiment of the present invention. As Figure 1As shown, an air conditioner 10 includes: a refrigerant circulation loop 11, an outdoor heat exchanger 12, an indoor heat exchanger 13, an indoor unit 14, an outdoor unit 15, an indoor fan 16, an indoor motor 17, an outdoor fan 18, an outdoor motor 19, an indoor coil temperature sensor 20, an indoor ambient temperature sensor 21, a heating device 22 and a controller 23. The refrigerant circulation loop 11 allows the refrigerant to circulate in a loop composed of a compressor, a condenser, an expansion valve, an evaporator, a four-way valve and a pressure reducer; the outdoor heat exchanger 12 and the indoor heat exchanger 13, one of which works as a condenser and the other works as an evaporator; the indoor unit 14 includes the indoor heat exchanger 13, which is used to exchange heat between the refrigerant and the indoor air; the outdoor unit 15 includes the outdoor heat exchanger 12, which is used to exchange heat between the refrigerant and the outdoor air; the indoor fan 16 is used to drive the indoor air through the indoor heat exchanger 13 by rotating, so that the refrigerant and the indoor air can exchange heat; the indoor motor 17 is used to drive the indoor fan 16; the outdoor fan 18 is used to drive outdoor air through the outdoor heat exchanger 12 by rotation, so that the refrigerant and the outdoor air can exchange heat; the outdoor motor 19 is used to drive the outdoor fan 18; the indoor coil temperature sensor 20 is used to detect the indoor coil temperature; the indoor ambient temperature sensor 21 is used to detect the indoor ambient temperature; the heating device 22 indoor unit 14 is used to heat the air flowing through the air outlet; the controller 23 is configured to: when the air conditioner 10 is in heating mode, determine the thermal insulation performance level of the room; control the operating power of the compressor, the heating device 22, and the speed of the outdoor motor 19 and the indoor motor 17 according to the thermal insulation performance level of the room and the indoor ambient temperature.

[0037] Specifically, the heat preservation performance level is a sign to measure the heat preservation performance of a room. When the air conditioner 10 is in the heating mode, the air conditioner 10 will perform temperature-controlled startup and shutdown according to the indoor ambient temperature. Specifically, when the indoor ambient temperature is higher than the first preset temperature, the air conditioner 10 performs temperature-controlled shutdown, that is, the compressor stops running, and then the indoor fan and the heating device 22 stop operating. At this time, the indoor ambient temperature begins to drop; when the indoor ambient temperature is lower than the second preset temperature, the air conditioner 10 performs temperature-controlled startup, that is, the indoor unit 14, the heating device 22, and the outdoor unit 15 are all in the working state, and the compressor runs at a constant frequency to increase the indoor ambient temperature; when the indoor ambient temperature rises to the first preset temperature, the air conditioner 10 performs temperature-controlled shutdown again, and so on. When the heat preservation performance level of the room is poor, the air conditioner 10 will frequently perform temperature-controlled startup and shutdown, and the user will feel cold and hot, resulting in a poor user experience. To enable users in rooms with different heat preservation performance levels to have a good user experience, the embodiment of the present invention controls the operating power of the compressor, the heating device 22, the rotation speeds of the outdoor motor 19 and the indoor motor 17 according to the heat preservation performance level of the room and the indoor ambient temperature, so as to adopt different control strategies for rooms with different heat preservation performance levels, thereby improving the user experience. It can be understood that the first preset temperature and the second preset temperature are preset temperature values stored in the controller 23, and the second preset temperature is not greater than the first preset temperature.

[0038] In an embodiment of the present invention, as Figure 2 shown, when controlling the operating power of the compressor, the heating device 22, the rotation speeds of the outdoor motor 19 and the indoor motor 17 according to the heat preservation performance level of the room and the indoor ambient temperature, the controller 23 is specifically configured to: when the room has a high heat preservation performance level and the indoor ambient temperature is greater than the first preset temperature, control the compressor to stop, control the outdoor motor 19 to stop running, control the heating device 22 to stop heating, and control the indoor motor 17 to stop running after operating for the first preset time; when the room has a high heat preservation performance level and the indoor ambient temperature is lower than the second preset temperature, control the compressor to start, control the outdoor motor 19 to run at the first preset rotation speed, control the heating device 22 to heat at the first preset power, and control the indoor motor 17 to run at the second preset rotation speed, where the second preset temperature is not greater than the first preset temperature. Specifically, the first preset temperature is the sum of the set temperature and the correction temperature, and the second preset temperature is the difference between the set temperature and the correction temperature.

[0039] Specifically, when the room has a high thermal insulation performance level, it is considered that the thermal insulation performance of the room is good, the heat dissipation is slow, the air conditioner 10 will not frequently perform temperature control startup and temperature control shutdown, the user experience is good, and the temperature control startup and temperature control shutdown can be performed normally according to the indoor ambient temperature. Specifically, when the indoor ambient temperature is greater than the first preset temperature, the compressor is controlled to stop, the outdoor motor 19 is controlled to stop running, the heating device 22 is controlled to stop heating, and the indoor motor 17 is controlled to stop running after running for the first preset time, at this time the indoor ambient temperature begins to drop; when the indoor ambient temperature drops to less than the second preset temperature, the compressor is controlled to start, the outdoor motor 19 is controlled to run at the first preset speed, the heating device 22 is controlled to heat at the first preset power, and the indoor motor 17 is controlled to run at the second preset speed to increase the indoor temperature. At this time, the indoor ambient temperature begins to rise. When the indoor ambient temperature rises to greater than the first preset temperature, the air conditioner 10 performs temperature control shutdown again, and so on. It can be understood that the heating device 22 is an electric auxiliary heating module in the air conditioner 10, which can be configured with different operating powers. The electric auxiliary heating module is usually a resistance wire or a heater, which is used to operate at a first preset power when the temperature control is turned on to provide additional heat and quickly increase the temperature of the indoor environment.

[0040] Furthermore, the first preset temperature is the sum of the set temperature and the correction temperature, and the second preset temperature is the difference between the set temperature and the correction temperature. The set temperature is the temperature set by the user, and the correction temperature is a constant of moderate size, which is used to adjust the first preset temperature and the second preset temperature to keep it around the set temperature, so that the first preset temperature and the second preset temperature are used as the basis for controlling the temperature control startup and temperature control shutdown of the air conditioner 10. That is, when the indoor ambient temperature is greater than the first preset temperature, it is considered that the target temperature set by the user has been reached, and temperature control shutdown is required to prevent the indoor ambient temperature from continuing to rise, which will cause a poor user experience. Therefore, the compressor is controlled to stop, the outdoor motor 19 is controlled to stop running, and the heating device 22 is controlled to stop heating. Since there is still residual heat after the heating device 22 stops heating, the indoor motor 17 is controlled to stop running after running for the first preset time, so that the air conditioner 10 can maximize the use of energy.

[0041] It is understandable that the first preset time is a preset time interval of moderate length to utilize the waste heat of the heating device 22 to heat the room. When the temperature control is turned off, the indoor ambient temperature begins to drop. When it drops to the second set temperature, it is considered that the indoor ambient temperature is lower than the target temperature set by the user, which will cause discomfort to the user and the indoor ambient temperature needs to be increased. Therefore, the compressor is controlled to start, and the outdoor motor 19 is controlled to operate at the first preset speed so that the air conditioner 10 operates in the normal heating mode. At the same time, the heating device 22 is controlled to heat at the first preset power, and the indoor motor 17 is controlled to operate at the second preset speed to quickly increase the indoor ambient temperature.

[0042] In a specific embodiment, the set temperature is, for example, 26°C, the correction temperature is, for example, 1°C, then the first preset temperature is 27°C, and the second preset temperature is 25°C. When the indoor ambient temperature is greater than the first preset temperature of 27°C, the compressor is controlled to stop, the outdoor motor 19 is controlled to stop running, the heating device 22 is controlled to stop heating, and the indoor motor 17 is controlled to stop running after running for a first preset time; when the indoor ambient temperature is less than the second preset temperature of 25°C, the compressor is controlled to start, the outdoor motor 19 is controlled to run at a first preset speed, the heating device 22 is controlled to heat at a first preset power, for example, 2KW, and the indoor motor 17 is controlled to run at a second preset speed.

[0043] In one embodiment of the present invention, Figure 3 As shown, when the operating power of the compressor and the heating device 22, the speed of the outdoor motor 19 and the indoor motor 17 are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, the controller 23 is specifically configured as follows: when the room has a low thermal insulation performance level and the indoor ambient temperature is greater than a first preset temperature, the compressor is controlled to stop, the outdoor motor 19 is controlled to stop running, the heating device 22 is controlled to heat at a second preset power, and the indoor motor 17 is controlled to run at a third preset speed, wherein the third preset speed is less than the second preset speed, and the second preset power is less than the first preset power; when the room has a low thermal insulation performance level and the indoor ambient temperature is less than the second preset temperature, the compressor is controlled to start, the outdoor motor 19 is controlled to run at a first preset speed, the heating device 22 is controlled to heat at a first preset power, and the indoor motor 17 is controlled to run at a second preset speed.

[0044] Specifically, when it is determined that the room has a low thermal insulation performance level, it is considered that the thermal insulation performance of the room is poor and the heat dissipation is fast, so the air conditioner 10 will frequently perform temperature control startup and temperature control shutdown, resulting in a poor user experience. Therefore, after the air conditioner 10 performs temperature control shutdown (i.e., when the indoor ambient temperature is greater than the first preset temperature), the embodiment of the present invention controls the compressor to stop, controls the outdoor motor 19 to stop running, controls the heating device 22 to heat at the second preset power, and controls the indoor motor 17 to run at the third preset speed, so that warm air is blown into the room through low-power heating of the heating device 22 and low-speed operation of the indoor fan, slowing down the speed at which the indoor ambient temperature drops, and avoiding frequent temperature control startup and temperature control shutdown of the air conditioner 10. When the indoor ambient temperature drops to less than the second preset temperature, it is considered that the indoor ambient temperature is lower than the target temperature set by the user, which will cause discomfort to the user and the indoor ambient temperature needs to be increased. Therefore, the compressor is controlled to start, the outdoor motor 19 is controlled to operate at the first preset speed, the heating device 22 is controlled to heat at the first preset power, and the indoor motor 17 is controlled to operate at the second preset speed, that is, the air conditioner 10 performs normal temperature control startup to quickly increase the indoor ambient temperature, thereby improving the user experience.

[0045] It should be noted that the second preset power is less than the first preset power to prevent the heating device 22 from being too high, causing the indoor environment temperature to continue to rise in a short period of time, exceeding the first preset temperature, causing discomfort to the user, and can provide continuous warm air to the indoor environment, slowing down the speed of the indoor environment temperature drop. At the same time, the operation of the heating device 22 at the second preset power is matched with the indoor fan rotating at the third preset speed, so as to blow the heat of the heating device 22 into the room at a lower wind speed. Exemplarily, the first preset power is, for example, 2KW, and the second preset power is, for example, 1KW.

[0046] In one embodiment of the present invention, before determining the thermal insulation performance level of the room, the controller 23 is further configured to control the operating power of the compressor and the heating device 22, and the speed of the outdoor motor 19 and the indoor motor 17 according to the indoor coil temperature.

[0047] Specifically, when the air conditioner 10 just starts to heat, cold air will be blown out due to the low temperature of the indoor coil, causing discomfort to the user. At this time, the air conditioner 10 should be controlled to enter the cold wind prevention stage, that is, before determining the thermal insulation performance level of the room, the operating power of the compressor and heating device 22, and the speed of the outdoor motor 19 and the indoor motor 17 should be controlled according to the indoor coil temperature, so that the air conditioner 10 can blow hot air at the beginning of heating, thereby further improving the user experience.

[0048] In one embodiment of the present invention, Figure 4As shown, when the operating power of the compressor and the heating device 22, the speed of the outdoor motor 19 and the indoor motor 17 are controlled according to the indoor coil temperature, the controller 23 is specifically configured as follows: when the indoor coil temperature is greater than the third preset temperature, the compressor is controlled to start, the outdoor motor 19 is controlled to operate at the first preset speed, the heating device 22 is controlled to heat at the first preset power, and the indoor motor 17 is controlled to operate at the second preset speed, wherein the third preset temperature is less than the second preset temperature; when the indoor coil temperature is not greater than the third preset temperature, the compressor is controlled to stop, the outdoor motor 19 is controlled to stop operating, the heating device 22 is controlled to heat at the third preset power, and the indoor motor 17 is controlled to operate at the fourth preset speed, wherein the third preset power is greater than the first preset power, and the fourth preset speed is less than the second preset speed.

[0049] Specifically, the third preset temperature is the temperature threshold of the indoor coil temperature when the air conditioner 10 enters the cold wind prevention stage. When the indoor coil temperature is greater than the third preset temperature, it is considered that the indoor coil temperature is high and the cold wind will not blow. At this time, the air conditioner 10 is controlled to start normally with temperature control, that is, the compressor is controlled to start, the outdoor motor 19 is controlled to operate at the first preset speed, and the heating device 22 is controlled to heat at the first preset power to increase the heating capacity, and the indoor motor 17 is controlled to operate at the second preset speed so that the indoor fan blows hot air into the room, quickly increases the indoor environment temperature, and improves the user's comfort. When the indoor coil temperature is not greater than the third preset temperature, it is considered that the indoor coil temperature is low and cold air will be blown. In order to prevent the discomfort caused by the blowing of cold air to the user, before controlling the air conditioner 10 to start up with normal temperature control, the heating device 22 is controlled to heat with the third preset power, and the indoor motor 17 is controlled to operate at the fourth preset speed, so that the air conditioner 10 can blow hot air at the beginning of heating, and the compressor is controlled to stop, and the outdoor motor 19 is controlled to stop running. In this way, after heating by the heating device 22, the indoor fan 16 is driven by the indoor motor 17 to blow the hot air into the room, thereby improving the user experience.

[0050] It is understandable that when the indoor coil temperature is less than the third preset temperature, it indicates that the indoor ambient temperature is also relatively low. The third preset power is set to be greater than the first preset power, which can quickly increase the indoor ambient temperature. At the same time, the indoor motor 17 is operated at a fourth preset speed, which is less than the second preset speed corresponding to the temperature control start of the air conditioner 10, that is, the indoor wind speed is operated in a low wind state to ensure the outlet air temperature and air volume at the same time. Exemplarily, the first preset power is, for example, 2KW, and the third preset power is, for example, 3KW.

[0051] In one embodiment of the present invention, Figure 5As shown, when determining the thermal insulation performance level of the room, the controller 23 is specifically configured to: determine the first time that the air conditioner 10 enters the heating mode; when the indoor ambient temperature is greater than a first preset temperature, control the compressor to stop, control the outdoor motor 19 to stop running, control the heating device 22 to stop heating, and control the indoor motor 17 to stop running after running for a first preset time, and obtain the time required for the indoor temperature drop to reach the preset drop; determine the thermal insulation performance level of the room according to the time required for the indoor temperature drop to reach the preset drop.

[0052] Specifically, the first time entering the heating mode is when the air conditioner 10 directly enters the heating mode when it is turned on, or when it switches to the heating mode from other modes for the first time. When the indoor ambient temperature is greater than the first preset temperature, the compressor is controlled to stop, the outdoor motor 19 is controlled to stop running, and the heating device 22 is controlled to stop heating, so as to stop all heating means, and the indoor motor 17 stops running after running for the first preset time, ensuring that all heat sources in the room disappear, so as to facilitate the subsequent determination of the thermal insulation performance level of the room. The lower the thermal insulation performance level, the faster the indoor temperature of the house drops in the absence of a heat source. Therefore, by obtaining the time required for the indoor temperature drop to reach the preset drop, the thermal insulation performance level of the room can be judged. It can be understood that if the air conditioner 10 is not entering the heating mode for the first time, there is no need to determine the thermal insulation performance level of the room again, and the thermal insulation performance level determined when entering the heating mode for the first time can be directly applied.

[0053] In a specific embodiment, the current operating mode of the air conditioner 10 can be set by the user through a remote control, an air conditioner APP (Application) in a mobile terminal, or a control panel on the body of the air conditioner 10, as well as through language, gestures and other operating methods, which are not limited here. It can be understood that a flag storage module can be set in the air conditioner to store flag information of the first entry of the air conditioner 10 into the heating mode, and the control module is used to modify the information stored in the flag storage module to the flag information of not entering the heating mode for the first time when the air conditioner 10 directly enters the heating mode when it is turned on or switches to the heating mode from other modes for the first time, so that by setting the flag storage module, it can be accurately determined whether the air conditioner 10 enters the heating mode for the first time, and when entering the heating mode for the first time, the thermal insulation performance level of the room can be determined.

[0054] In one embodiment of the present invention, Figure 6As shown, when determining the thermal insulation performance level of a room based on the time required for the indoor temperature drop to reach a preset drop, the controller 23 is specifically configured as follows: when the required time is greater than a second preset time, determining that the room has a high thermal insulation performance level; when the required time is not greater than the second preset time, determining that the room has a low thermal insulation performance level, wherein the second preset time is determined based on the current outdoor ambient temperature and the indoor ambient temperature.

[0055] Specifically, at different outdoor ambient temperatures and indoor ambient temperatures, the time required for the indoor temperature drop to reach the preset drop is different. Therefore, when determining the thermal insulation performance level of the room by the second preset time, it is necessary to determine the second preset time according to the outdoor ambient temperature and the indoor ambient temperature. After the second preset time is determined according to the current outdoor ambient temperature and the indoor ambient temperature, when the required time is greater than the second preset time, that is, the indoor ambient temperature drops slowly, it is considered that the room has a high thermal insulation performance level; when the required time is not greater than the second preset time, that is, the indoor ambient temperature drops quickly, it is considered that the room has a low thermal insulation performance level.

[0056] In one embodiment of the present invention, when determining the second preset time based on the current outdoor ambient temperature and the indoor ambient temperature, the controller 23 is specifically configured as follows: based on the current outdoor ambient temperature and the indoor ambient temperature, query the preset outdoor ambient temperature step-indoor ambient temperature step-preset time correspondence mapping table to obtain the second preset time corresponding to the current outdoor ambient temperature and the indoor ambient temperature.

[0057] Specifically, the outdoor ambient temperature step-indoor ambient temperature step-preset time correspondence mapping table is experimentally calibrated and stored in the controller 23. According to the current outdoor ambient temperature and indoor ambient temperature, the second preset time corresponding to the current outdoor ambient temperature and indoor ambient temperature can be obtained from the outdoor ambient temperature step-indoor ambient temperature step-preset time correspondence mapping table, so as to determine the thermal insulation performance level of the room according to the second preset time.

[0058] According to the air conditioner 10 of the embodiment of the present invention, the air conditioner 10 includes: a refrigerant circulation loop 11, an outdoor heat exchanger 12, an indoor heat exchanger 13, an indoor unit 14, an outdoor unit 15, an indoor fan 16, an indoor motor 17, an outdoor fan 18, an outdoor motor 19, an indoor coil temperature sensor 20, an indoor ambient temperature sensor 21, a heating device 22 and a controller 23. Among them, the refrigerant circulation loop 11 allows the refrigerant to circulate in the loop composed of the compressor, condenser, expansion valve, evaporator, four-way valve and pressure reducer; the outdoor heat exchanger 12 and the indoor heat exchanger 13, one of which works as a condenser and the other works as an evaporator; the indoor unit 14 includes the indoor heat exchanger 13, which is used to exchange heat between the refrigerant and the indoor air; the outdoor unit 15 includes the outdoor heat exchanger 12, which is used to exchange heat between the refrigerant and the outdoor air; the indoor fan 16 is used to drive the indoor air through the indoor heat exchanger 13 by rotation, so that the refrigerant and the indoor air are heat exchanged; the indoor motor 17 is used to drive the indoor fan 16; the outdoor fan 18 is used to drive the outdoor air through the indoor heat exchanger 13 by rotation The outdoor heat exchanger 12 is used to exchange heat between the refrigerant and the outdoor air; the outdoor motor 19 is used to drive the outdoor fan 18; the indoor coil temperature sensor 20 is used to detect the indoor coil temperature; the indoor ambient temperature sensor 21 is used to detect the indoor ambient temperature; the heating device 22 indoor unit 14 is used to heat the air flowing through the air outlet; the controller 23 is configured to: when the air conditioner 10 is in the heating mode, determine the thermal insulation performance level of the room; according to the thermal insulation performance level of the room and the indoor ambient temperature, control the operating power of the compressor and the heating device 22, the speed of the outdoor motor 19 and the indoor motor 17, so as to adopt different control strategies for rooms with different thermal insulation performance levels, thereby improving the user experience. Further, before determining the thermal insulation performance level of the room, the operating power of the compressor and the heating device 22, the speed of the outdoor motor 19 and the indoor motor 17 are controlled according to the indoor coil temperature, so that the air conditioner 10 can continue to blow out hot air through the heating device 22 in the cold wind protection stage, avoid discomfort to the user, and further improve the user experience.

[0059] A further embodiment of the present invention also discloses a control method for an air conditioner, which is used for the air conditioner as described in any of the above embodiments. Figure 7 As shown, the method comprises the following steps:

[0060] Step S1: When the air conditioner is in heating mode, determine the thermal insulation performance level of the room.

[0061] Step S2: Control the operating power of the compressor and the heating device, and the rotation speed of the outdoor motor and the indoor motor according to the thermal insulation performance level of the room and the indoor ambient temperature.

[0062] In one embodiment of the present invention, the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, including: when the room has a high thermal insulation performance level and the indoor ambient temperature is greater than a first preset temperature, the compressor is controlled to stop, the outdoor motor is controlled to stop running, the heating device is controlled to stop heating, and the indoor motor is controlled to stop running after a first preset time; when the room has a high thermal insulation performance level and the indoor ambient temperature is less than a second preset temperature, the compressor is controlled to start, the outdoor motor is controlled to run at a first preset speed, the heating device is controlled to heat at a first preset power, and the indoor motor is controlled to run at a second preset speed, wherein the second preset temperature is not greater than the first preset temperature.

[0063] In one embodiment of the present invention, the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, including: when the room has a low thermal insulation performance level and the indoor ambient temperature is greater than a first preset temperature, the compressor is controlled to stop, the outdoor motor is controlled to stop running, the heating device is controlled to heat at a second preset power, and the indoor motor is controlled to run at a third preset speed, wherein the third preset speed is less than the second preset speed, and the second preset power is less than the first preset power; when the room has a low thermal insulation performance level and the indoor ambient temperature is less than the second preset temperature, the compressor is controlled to start, the outdoor motor is controlled to run at a first preset speed, the heating device is controlled to heat at a first preset power, and the indoor motor is controlled to run at a second preset speed.

[0064] In one embodiment of the present invention, before determining the thermal insulation performance level of the room, the process includes: controlling the operating power of the compressor and the heating device, and the rotation speeds of the outdoor motor and the indoor motor according to the indoor coil temperature.

[0065] In one embodiment of the present invention, the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the indoor coil temperature, including: when the indoor coil temperature is greater than the third preset temperature, controlling the compressor to start, controlling the outdoor motor to operate at a first preset speed, controlling the heating device to heat at a first preset power, and controlling the indoor motor to operate at a second preset speed, wherein the third preset temperature is less than the second preset temperature; when the indoor coil temperature is not greater than the third preset temperature, controlling the compressor to stop, controlling the outdoor motor to stop operating, controlling the heating device to heat at a third preset power, and controlling the indoor motor to operate at a fourth preset speed, wherein the third preset power is greater than the first preset power, and the fourth preset speed is less than the second preset speed.

[0066] In one embodiment of the present invention, determining the thermal insulation performance level of a room includes: determining that the air conditioner enters the heating mode for the first time; when the indoor ambient temperature is greater than a first preset temperature, controlling the compressor to stop, controlling the outdoor motor to stop running, controlling the heating device to stop heating, and controlling the indoor motor to stop running after a first preset time, and obtaining the time required for the indoor temperature to drop by a preset amount; determining the thermal insulation performance level of the room according to the time required for the indoor temperature to drop by a preset amount.

[0067] In one embodiment of the present invention, the thermal insulation performance level of the room is determined based on the time required for the drop in indoor temperature to reach a preset drop, including: when the required time is greater than a second preset time, determining that the room has a high thermal insulation performance level; when the required time is not greater than the second preset time, determining that the room has a low thermal insulation performance level, wherein the second preset time is determined based on the current outdoor ambient temperature and the indoor ambient temperature.

[0068] In one embodiment of the present invention, the second preset time is determined based on the current outdoor ambient temperature and the indoor ambient temperature, including: based on the current outdoor ambient temperature and the indoor ambient temperature, querying a preset outdoor ambient temperature step-indoor ambient temperature step-preset time correspondence mapping table to obtain the second preset time corresponding to the current outdoor ambient temperature and the indoor ambient temperature.

[0069] In one embodiment of the present invention, the first preset temperature is the sum of the set temperature and the correction temperature, and the second preset temperature is the difference between the set temperature and the correction temperature.

[0070] According to the control method of the air conditioner of the embodiment of the present invention, when the air conditioner is in the heating mode, the thermal insulation performance level of the room is determined, and the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, so as to adopt different control strategies for rooms with different thermal insulation performance levels, thereby improving the user experience. Furthermore, before determining the thermal insulation performance level of the room, the operating power of the compressor and the heating device, and the speed of the outdoor motor and the indoor motor are controlled according to the indoor coil temperature, so that the air conditioner can continue to blow out hot air through the heating device even in the cold wind protection stage, so as to avoid discomfort to the user and further improve the user experience.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0072] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner, It is characterized in that include: The refrigerant circulation loop allows the refrigerant to circulate in a loop consisting of a compressor, a condenser, an expansion valve, an evaporator, a four-way valve and a pressure reducer; an outdoor heat exchanger and an indoor heat exchanger, wherein one operates as the condenser and the other operates as the evaporator; An indoor unit, the indoor unit comprising the indoor heat exchanger, for exchanging heat between the refrigerant and the indoor air; An outdoor unit, the outdoor unit comprising the outdoor heat exchanger, for exchanging heat between the refrigerant and the outdoor air; An indoor fan, used to drive the indoor air to pass through the indoor heat exchanger by rotating, so that the refrigerant and the indoor air can exchange heat; An indoor motor, used for driving the indoor fan; An outdoor fan is used to drive outdoor air to pass through the outdoor heat exchanger by rotating so that the refrigerant and the outdoor air can exchange heat; An outdoor motor, used for driving the outdoor fan; Indoor coil temperature sensor, used to detect indoor coil temperature; Indoor ambient temperature sensor, used to detect indoor ambient temperature; A heating device, used to heat the air flowing through the air outlet; a controller configured to: determine a thermal insulation performance level of a room when the air conditioner is in a heating mode; The operating power of the compressor and the heating device, and the rotation speeds of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature.

2. The air conditioner according to claim 1, It is characterized in that When the operating power of the compressor and the heating device, and the rotation speeds of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, the controller is specifically configured as follows: When the room has a high thermal insulation performance level and the indoor ambient temperature is greater than a first preset temperature, the compressor is controlled to stop, the outdoor motor is controlled to stop running, the heating device is controlled to stop heating, and the indoor motor is controlled to stop running after running for a first preset time; When the room has a high thermal insulation performance level and the indoor ambient temperature is lower than a second preset temperature, the compressor is controlled to start, the outdoor motor is controlled to operate at a first preset speed, the heating device is controlled to heat at a first preset power, and the indoor motor is controlled to operate at a second preset speed, wherein the second preset temperature is not higher than the first preset temperature.

3. The air conditioner according to claim 2, It is characterized in that When the operating power of the compressor and the heating device, and the rotation speeds of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature, the controller is specifically configured as follows: When the room has a low heat insulation performance level and the indoor ambient temperature is greater than the first preset temperature, control the compressor to stop, control the outdoor motor to stop running, control the heating device to heat at a second preset power, and control the indoor motor to run at a third preset speed, where the third preset speed is less than the second preset speed and the second preset power is less than the first preset power; When the room has a low heat insulation performance level and the indoor ambient temperature is less than the second preset temperature, control the compressor to start, control the outdoor motor to run at the first preset speed, control the heating device to heat at the first preset power, and control the indoor motor to run at the second preset speed.

4. The air conditioner according to claim 3, characterized in that before determining the heat insulation performance level of the room, the controller is further configured to: control the compressor, the operating power of the heating device, the outdoor motor and the speed of the indoor motor according to the indoor coil temperature.

5. The air conditioner according to claim 4, characterized in that when controlling the compressor, the operating power of the heating device, the outdoor motor and the speed of the indoor motor according to the indoor coil temperature, the controller is specifically configured to: when the indoor coil temperature is greater than a third preset temperature, control the compressor to start, control the outdoor motor to run at the first preset speed, control the heating device to heat at the first preset power, and control the indoor motor to run at the second preset speed, where the third preset temperature is less than the second preset temperature; when the indoor coil temperature is not greater than the third preset temperature, control the compressor to stop, control the outdoor motor to stop running, control the heating device to heat at a third preset power, and control the indoor motor to run at a fourth preset speed, where the third preset power is greater than the first preset power and the fourth preset speed is less than the second preset speed.

6. The air conditioner according to claim 1, characterized in that when determining the heat insulation performance level of the room, the controller is specifically configured to: determine that the air conditioner first enters the heating mode; when the indoor ambient temperature is greater than the first preset temperature, control the compressor to stop, control the outdoor motor to stop running, control the heating device to stop heating, and control the indoor motor to stop running after running for a first preset time, and obtain the time required when the decrease in the indoor temperature reaches a preset decrease; determine the heat insulation performance level of the room according to the time required when the decrease in the indoor temperature reaches the preset decrease.

7. The air conditioner according to claim 6, characterized in that when determining the heat insulation performance level of the room according to the time required when the decrease in the indoor temperature reaches the preset decrease, the controller is specifically configured to: when the required time is greater than a second preset time, determine that the room has a high heat insulation performance level; When the required time is not greater than the second preset time, it is determined that the room has a low thermal insulation performance level, wherein the second preset time is determined according to the current outdoor ambient temperature and the indoor ambient temperature.

8. The air conditioner according to claim 7, It is characterized in that When the second preset time is determined according to the current outdoor ambient temperature and the indoor ambient temperature, the controller is specifically configured as follows: According to the current outdoor ambient temperature and indoor ambient temperature, a preset outdoor ambient temperature step-indoor ambient temperature step-preset time correspondence mapping table is queried to obtain the second preset time corresponding to the current outdoor ambient temperature and indoor ambient temperature.

9. The air conditioner according to any one of claims 2 to 8, It is characterized in that The first preset temperature is the sum of the set temperature and the correction temperature, and the second preset temperature is the difference between the set temperature and the correction temperature.

10. A method for controlling an air conditioner, It is characterized in that For the air conditioner according to any one of claims 1 to 9, the method comprises the following steps: When the air conditioner is in a heating mode, determining a thermal insulation performance level of the room; The operating power of the compressor and the heating device, and the rotation speed of the outdoor motor and the indoor motor are controlled according to the thermal insulation performance level of the room and the indoor ambient temperature.

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